Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb8ff6b94502670f…

MALICIOUS

PDF

126.1 KB Created: 2021-01-08 16:09:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 73a5aeff94e55f9cb107b6751929d288 SHA-1: 92e48c1ef08ff11aa7d9ef8e820949266b084735 SHA-256: eb8ff6b94502670fd4e4d4027713580efbe8942b26793431ca31ebfb94dced92
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The heuristic 'PDF_SEO_LINK_FARM' indicates a deliberate attempt to create a link farm, likely to distribute malicious content or engage in phishing. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://gettraff.ru/123?utm_term=asiatic+black+bear+baby In PDF document text
    • https://denonifo.weebly.com/uploads/1/3/4/7/134709080/5644242.pdfIn PDF document text
    • https://fopimakalegej.weebly.com/uploads/1/3/0/7/130738542/pimagipidi.pdfIn PDF document text
    • https://cdn.sqhk.co/zenetofuma/rPgebqq/dejokepezagarejaxodojuvur.pdfIn PDF document text
    • https://tujezaxe.weebly.com/uploads/1/3/4/6/134616668/riberodenibuzo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411512/normal_5fceabf5eed0f.pdfIn PDF document text
    • https://wilowukodol.weebly.com/uploads/1/3/4/8/134881933/f24b7c970edcd66.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/takateg/bruce_leroy_sho_nuff.pdfIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/canonical_authors_of_philippine_national_artists_in_literature.pdfIn PDF document text
    • https://s3.amazonaws.com/zafaronivaj/kiziwuvuvuw.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/wie_kann_ich_anonyme_anrufe_sperren_android.pdfIn PDF document text
    • https://s3.amazonaws.com/kevava/lojadetusokebowi.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017c1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17C1B 5620 bytes
SHA-256: 5927bdbdcf4e43724696364c2d85816cce4f30922a95b1d1d573f464fbaf778a
font_01_sfnt_off00018f97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18F97 5088 bytes
SHA-256: ee3462f90a4f4ed150ca556c88fa9312e9e35e47562f87116f02daa49fb2c824
font_02_sfnt_off0001a0f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A0F6 1716 bytes
SHA-256: 70b844f74996fcee5e1d27ce90af7085dab18ef8498285b96f5f41c426451930
font_03_sfnt_off0001a99c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A99C 12776 bytes
SHA-256: 0a9f5e3ec100d75c2a2a522d2630bc0f7b7bbfe26014885492f7fb832d3cb62a
font_04_sfnt_off0001d37e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D37E 16164 bytes
SHA-256: 0ddbdf075a6b93c30840c956f82c28930afd570615945c5f10d387cf6e2c8926

Open this report in the interactive analyzer, or submit your own file for analysis.